Apparatus for separating solids from currents of gases



June 3, 1952 T. K. STEVENSON 2,599,139

APPARATUS FOR SEPARATING SOLIDS FROM CURRENTS OF GASES Filed Oct. 5, 1949 5 Sheets-Sheet l I5 I c, ,7]

A 7 F 4. f m

INVENTOR. 771% K. STEVENSON June 1952 T. K. STEVENSON 2,599,139

APPARATUS FOR SEPARATING SOLIDS FROM CURRENTS 0F GASES Filed Oct. 5, 1949 5 Sheets-Sheet 2 IN V EN TOR. THOMAS K. 51-: vnvsoll.

June 3, 1952 T. K. STEVENSON 2,599,139

APPARATUS FOR SEPARATING SOLIDS FROM CURRENTS OF GASES Z Sheets-Sheet 5 Filed 001:. 5, 1949 INVENTOR.

77/onAs K. STEVE/{50M Patented June 3, 1952 APPARATUS FOR SEPARATING S OI ZIDS FROM CURRENTS OF GASES Thomas K. Stevenson, Cleveland, Ohio, assignor to National Smoke Control Corporation, Cleveland, Ohio, a corporation of Ohio Application October 5, 1949; Serial No. 119,706

My invention relates to new and usefulimprovements in apparatus for separating solids from currents of gases, and more particularly to.

means for treating stack smoke to remove the soot, cinders and other ash particles therefrom.

While the, invention is primarily intended to inthe chamber, and means'for controlling the degree of pivotal movement of the baflles. I also provide a novel system of spray heads for the water to wash down the particles and novel means for removal ofthe washed-down particles.

While I have illustrated in the accompanying drawings and have hereinafter fully described certain specific embodiments of my invention, it is-to be distinctly understood that I do not consider my invention to be limited to' said specific embodiments, but refer for its scopeto the claims appended hereto.

In the drawings: v

Fig. 1 is a vertical section of one form of the device.

i Fig. 2 is a horizontal section on line 2-2 of Fig. 1.

Fig. 3 is an enlarged fragmentary perspective view of one of the pivoted baffles.

Fig 4 is an enlarged side elevation of one of the spray heads.

Fig. 5 is a vertical section of the spray head of Fig. 4.

, Fig. 6 tea side elevation of another form of the device. v

Fig. '7 is a vertical section of another form of the device.

Fig. 8 is a verticalsection on line 8-8 of Fig. '7.

Fig. 9 is a horizontal section on the line 99 of Fig. 7.

.Fig. 10 is a side elevation partlyin section'of another form of the device.

In the form of the device shown'in Fig. l, the stack S is connected with the chamber C by intake. duct D and outlet duct D-l and has a damper d disposed therein between the ducts. The chamber C is closed at the top and has a bottom I provided with a floor 2 made of suitable non-corrosive material, such as concrete and having a plurality'of discharge vents 3 therethrough.

' Suitably disposed below the chamber C, there is a hopper C-l having a discharge conduit 4. The

' chamber C and hopper -1 are suitably mounted on a roof R through which passes the conduit 4 discharging intoa suitable container removably mounted above a tank "6, and having a peri'orated'b'ottom 5-a.

9 Claims. (Cl. 183-21) I The chamber 0 is rectangular in cross-section V 2' (Fig. 2) and has mounted on .its side walls I a plurality of U-shaped brackets 8, the arms 8-41 of each of which carry a series of rods 9 on which are pivoted a series of bafiles' [0 respectively. These'baflies II] are made of suitable lightweight metal, such as aluminum. Each baffle ID has an angular flange H on its upper edge having ears l2 on its ends for engagement 'withthe arms 8-11 of the brackets 8 to serve as stops when the bafiles. III are rotated about rods 9, as shown in broken lines in. Fig. 1.

Eachof the ears I2 projects'outwardly from an end of the flange H to overlie the adjacentarm 8-a and provide a shoulder at the front of, the ear and a shoulder at the back of the ear. The back shoulder is so related to the plane of the body of the bafiie In that the body normally hangs substantially vertically from its pivotal connection on the rod 9 but is free to swing in one direction only, i. e., in such direction as to bring the front shoulder of the ear down toward engagement with the arm 8-a, as shown-in dotted lines in Fig. 1. Movement backwards beyond the vertical planeis prevented by engagement of the back shoulder of the ear I2 with the arm 8-41.,

It will be'evident that instead of hanging in accurately vertical planes, each of the baflles may have one or both of its ears l2 so related to the plane of the body portion of the bafile that the body portion will hang normally in a plane slightly'inclined to the vertical, in the direction toward which the baffle is free to swing to the dotted line position shown in Fig. 1.'

In either case it will be evident that a rising current of gas moving at low velocity will deposit solid particles on the undersurfaces of the flanges I I, without swinging the baflles from their normal depending positions, and that a more, rapidly rising current will tend to swing the baflles'toward their dotted line positions. This results from the fact that any rapidly rising current necessarily includes some swirling movement having a lateral vector. Such lateral components will necessarily include, sooner or later, a vector applying pressure against what may be termed the inside of the body of each baflle, i. e., the surface on the side from which the flange ll extends, such pressure will cause the bafile to swing to the dotted line position. As has been explained, the baflle cannot swing in the opposite direction because of the engagement of the back shoulder of the ear I 2 with the arm 8-a. Once started in its swinging movement, there is no possibility of the bafile swinging back until the velocity of the current decreases, and of course it is impossible for the battle to swing back past its vertical or substantially vertical position. i

It will be appreciated that the under side of each flange ll receives a deposit of solid particles when the current moves at a very slow rate and that such under side and the side surface of each baflle receive a deposit when the balfles V spray heads 13 (Figs. 1, 2, 4 and H I3 comprises a round hollow-body 1 341, a tanform of Fig, '1.'

capacity of the flange and body surfaces to re' ceive a deposit of solid particles; I provide, for the chamber C, a plurality p1 Each head gential inlet pipe l3-b, an axial discharg p rt l3-c, a needle valve I3-d, threaded in an axial sleeve l3e and having an adjustable head 13* sinuous passageror the current. It will also be noted that the parts are so designed and related that the ears [2 function to limit the upward and lock nut [3-9. The forward portion "Id-h of I 7 a the body I3-a, circumferential of the port 13-0,

divergesoutwardly to acircumferential flange l3 -i fitted inan orifice in the wall of the shamber Ci heads 13 are connected by pipe 15-, with valve 15''... to pump P driven bymotorM and hav v ing intake pipe 16 fromflthe tank}. Abye pass pipe 11 with valve .I'I' connects pipe 15 with tank/5. ."I'ankt has a supply-discharge pipe 18,

with valve [8.

the forin-o'i the device shown in Fig. 6, the chamber 0-2 and the hopper (3-3, which are substantially identical in formwith chamber' C andhopperc-lof Fig. 1, are mounted by means envelopingframe 20 on a roof Ref, between twin stacks 8-1 and 8-2.. Thechamber 0-2 is connected with stacks S4 and S-2- by ducts D 2 andTDS, respectively. The. stacks .S- 'l and 3-2 are-provided with dampers d-I, and the chamber c-.2 hasan open throat C-d at its top. A cleanout doorll. is provided for the chamber 0-2. The chamber G4 has spray heads 13 connected by pipes [5 with a tank (not shown) as in the In theform of thedevice shown in Fig. '7, the chamber (J- 5 is dis'posed'in the stack 8-3 by means of a shroud 22 mounted on top of stack 8-3 and connected .to c'hamberC-S by a spider 23, to provide an annular space 24 between cham-- ber C.5 and stack 5-3.. Shroud 22 has an open topthroat 25' and chamber 0-5 has an open bottom-.throat 26.. ChamberC-S is provided with bafiles 1'0, as chamberC and .C-2', butluas no spray heads. 7 I

The chamber (3-5 is rectangular. inv crosssection (Fig.9) and has a gable roof 21 mounted on it'sside-walls 2B (FigJ'D. Each element '21-.0

of this roof ZIcomprises a plurality of baffles 2'9.- with intermediatefs'i nuous discharge passages 3H. therebetween' (Fig.8) connecting the interior oi' -chamber 0-5 with throat 25. p

I The form .of the device shown in Fig. .10 has a ;.c'hamber- C-G, substantially? identical with chamber (#5, mounted in a; s roud 2'2-,-a which projects from a casing 3f mounted on top of stack s-rand having. a damper 6-2. Ahopp'er 321isprovi ded alongside stacks-4 under-casing 3'l' coai ial with chamber'C-B and having a discharge duct 33 provided with a pair of. slide gates 31 and 35 The chamber, (7-6 has in its endwall 7 36' ports 3'! for communication between the interior of casing C95 and the discharge throat 25 of shroud 22 a. Suchports maybe supplied in easing C-5 of .theiorm in Fig. 7.

willnow' describe the use andoperation of my improved 7 device. In the form of the device shown in Fig l, the'upward current pf smoke, hot air or' other g'asesin the stack S isby-passed, by closing the damper d, topass through duct pro the chamber-'0, therethrough, and through duct D -I to the stack S, 'The upward fiow oi this current, through thechamber C, tends to swingthe baflles [-0 on their rods 9 toassume the movement or thebaifles [0 to prevent undue raisingof the bailies flliwhich would close the passage.

Water, supplied from tank 6 by pump P through pipe l5-*a nd head's l3, serves to wash down any sol-id matter impinging upon the baflies H] to be precipitated to the floor 2 and pass through vents 3 intohopper 0-4 and through conduit 4 to containers. v V Inthe form of the device shown in Fig; '6, the upward ourrents stacks S4 and 5-: can be} introduced into chamber C -"'2 through ducts'lfwi and D 3, res ectively, by closing one orv tempt the dampers d-l'. These currents receive tlie same treatmentin *chamber'C-2 as that above described and escape therefrom through the throat C-I. I In the form of the device shown in '7, the upward currentin stack 8-3 passes upwardly through, thechamb'er 0-51 Anysolid pardons which may be carried bytneicurrent'past the ba'flle's' it are trapped by the pad-es 29' of the.

, 3|"to the chamber C-.-6 where it is treated inns same'manner as the current in the chamber (3-5 above: described. The solid particles removed from the urrent by the names are precipitated int'oihop'per 32 and discharged througn duct 3! by the manipulation .of gatesct and 35." Gate 34 being opened, the solids are deposited on gate 35. Gate 34 being closed, the gate '35" can be opened to discharge the solids without permitting an up-draft through duct 33. I

While the herein described embodiments: are; believed to adequately fulfill the objects and ad: vantages herein stated, it is to be understood that many modifications and variations may be made therein without departing from the spirit and scope of my invention, as set fcr'th in the subjoined claims. M I a V q Having described my invention, what I claim 1. In an apparatus for separating solids fro a current of gas, the combination of an upright chamber; means for causing the current tozflow ber '2'. an apparatus .for separating solids from a urrent of. gas, the, combinationnf anv 111 -1 right chamber; nieansfer causing the current tono'w upwardly itnrough said chamber; a pin rality of. brackets'lirloliiited in said chamber? a lurality of rods mounted on} each or said brads ets; a: name pivoted on eacnof said. rods so as" to han substantially.vertioally'tlierfrom; and an ear on at least one end oHnnppen edge'of said. 'oafiles, the parts being so rented tiiatdi baflles are interposed in the path of flow of said current to be rotated about their pivots by said current to provide surfaces for obstructing solid particles in said current, and the ears engaging the brackets to limit the degree of said rotation to provide a sinuous passage for said current between said bafiles.

3. In an apparatus for separating solids from a current of gas, the combination of an upright chamber; means for causing the current to flow upwardly through said chamber; a plurality of bailies pivoted in said chamber so as to hang substantially vertically and be rotated about their pivots by said current and thereby provide surfaces for obstructing solid particles in said current; said baffles being arranged in spaced groups extending diagonally upwards from the sides of the chamber in staggered relation; means on said bafiies for limiting the degree of rotation to pro-' vide a sinuous passage for said current between said baiiies; a hopper below said chamber, said chamber having a plurality of vents discharging into said hopper; a discharge conduit for said hopper; and a container removably disposed be low said conduit.

4. In an apparatus for separating solids from a current of gas, the combination of an upright chamber; means for causing the current to flow upwardly through said chamber; a plurality of baffles pivoted in said chamber so as to hang substantially vertically and be rotated about their pivots by said current and thereby provide surfaces for obstructing solid particles in said current; means on said bafiles for limiting the degree of rotation to provide a sinuous passage for said current between said baflies; a plurality of spray-heads in said chamber; a hopper below said chamber, said chamber having a plurality of vents discharging into said hopper; a tank below said hopper; a discharge conduit for said hopper communicating with said tank; a container provided with a perforated bottom removably disposed in said tank below said conduit; and means for supplying water from said tank to said spray-heads.

5. In an apparatus for separating solids from a current of gas, the combination of a stack; an upright chamber mounted adjacent said stack; an inlet duct from said stack to the lower end of said chamber; a discharge duct from the upper end of said chamber to said stack; a damp-' er in said stack between said ducts; a plurality of baflles pivoted in said chamber so as to hang substantially vertically and be rotated about their pivots by said current and thereby provide surfaces for obstructing solid particles in said current; said baflles being arranged in spaced groups extending diagonally upwards from the sides of the chamber in staggered relation; and means on said bafiles for limiting the degree of rotation to provide a sinuous passage for said current between said baifies.

6. In an apparatus for separating solids from a current of gas, the combination of a stack; an upright chamber mounted adjacent said stack; an inlet duct from said stack to the lower end of said chamber; a discharge duct from the u per end of said chamber to said stack; a damper in said stack between said ducts; a plurality of baflles pivoted in said chamber so as to hang substantially vertically for rotation by said current; said bafiles being arranged in spaced groups extending diagonally upwards from the sides of the chamber in staggered relation; means for limiting the degree of rotation of said baflles to provide a sinuous passage for said current between said baflles; a hopper below said chamber, said chamber having a plurality of vents discharging into said hopper; a dischargeconduit for said hopper; and a container removably disposed below said conduit.

7. In an apparatus for separating solids from a current of gas, the combination of a plurality of stacks; an upright chamber disposed adjacent said stacks and having a discharge throat at its top; supply ducts connecting said stacks, respectively, with the lower end of said chamber, dampers in said stacks, respectively, above said ducts, a plurality of baflies pivoted in said chamber so as to hang substantially vertically and be rotated about their pivots by said'current and thereby provide surfaces for obstructing solid particles in said currents; and means on said baflles for limiting the degree of rotation to provide a sinuous passage for said current between said baflles.

8. In an apparatus for separating solids from a current of gas flowing through a stack, the combination of a shroud mounted on top of the stack and having a discharge throat at its top; an upright chamber supported in said shroud and having its lower end open and in said stack and its upper and provided with a plurality of sinuous ducts communicating with said discharge throat; a plurality of baflies pivoted in said chamber so as to hang substantially vertically and be rotated about their pivots by said current'and thereby provide surfaces for obstructing solid particles in said current; and means on said bafiles for limiting the degree of rotation to provide a sinuous passage for said current between said baflies.

9. In an apparatus for separating solids from a current of gas flowing through a stack, the combination of a casing mounted on said stack and having a discharge opening co-axial with said stack; a damper for said opening; a shroud mounted on said casing and having a discharge throat at its top; an upright chamber supported in said shroud and having its lower end communicating with said casing and its upper end provided with a plurality of sinuous ducts communicating with said discharge throat; a plurality of battles pivoted in said chamber so as to hang substantially vertically and be rotated about their pivots by said current and thereby providev surfaces for obstructing solid particles in said current; and means on said baflies for limiting the degree of rotation to provide a sinuous passage for said current between said baflies.

THOMAS K. STEVENSON.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 984,394 Romig Feb. 14, 1911 1,009,963 Gamblin Nov. 28. 1911 1,107,986 Muller Aug. 18, 1914 1,177,129 Mulvany Mar. 28, 1916 1,493,579 Walker May 13, 1924 1,570,577 Romero Jan. 19, 1926 FOREIGN PATENTS Number Country Date 262,921 Germany July 26, 1913 350,573 Germany Mar. 21, 1922 

